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Nonlinear Equations in One Variable and Systems of Equations

SAT Math· difficulty 3/5

Solve x2−4<0x^2 - 4 < 0.

  • A

    x<−2x < -2 or x>2x > 2

  • B

    x<2x < 2

  • C

    x>−2x > -2

  • D

    −2<x<2-2 < x < 2

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Explanation

(x−2)(x+2)<0(x-2)(x+2) < 0 when xx is between roots: −2<x<2-2 < x < 2.

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